I think all browsers nowadays allow one to choose whether new pages open up as new tabs or new windows. Am I wrong? Certainly Firefox and Chrome do. IE as well, I believe. And many of the alternative browsers are built on other platforms. K-Meleon, Avant, Sea Monkey, Maxthon, and a few others. I believe Opera was designed from the ground up. Those are windows browsers. A little research will turn up a few for Macs as well, I'm sure.